Hi, I looked into your zip file and found no shp files in it but a layer package. As far as I know, ArcGIS online doesn't allow other files other than. "zipped shapefile (ZIP), a comma or tab delimited text file (CSV or TXT), or a GPS data file (GPX) with up to 1000 features in it (or 250 features when geocoding addresses)" I am having the same error show up and I have made sure I have all of the required .shp, prj, dbf, ect. I have also tried to add it to a personal geodatabase and a file geodatabase and they all yeild the same result (Invalid Shapefile: missing shp file) I have attached the file I am trying to upload any help would be greatly appreciated.
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